Racing can be described as a way to compete and measure performance between people, cars, horses, and many others. Racing is usually based on time, with the winner being the one which had the lowest time.
When people race a marathon they are participating in a competition in which the person who crosses the finish line first wins. People who race must be in good physical condition so they can have the endurance to participate.
Racing is highly competitive and requires the participant to prepare for the event. Success in racing cars is test against the skills and abilities of not only the driver, but the crew who built the engine or tuned the car.